Improvement- in steam lift and force pumps



JAMES B. MAXWELL AND E'ZRA Corn, or CINCINNATI, oriio.

IMPfRO'vEME-NTIN STEAM LIFT'ANDF'CRCE PUMPS?.

specification armingpart ofLetters Patent No. 9%6'2'7, dated July 13; 1869;

and we'do hereby declare thefollowing tob'e an exact'descripton' of the Construction and' operation of thev same, reference'being had to theaccompanyiug drawings, making part of 'this specification.

Figure v1 in the drawings is an exhibit lof the manner of constructing, arranging, and combining the parts of'our steam-pumps, as shown in the vertical secti'onor elevation, bi-

sectedthrough the lines 7'and 8, Figs. 3, 4,-

and 5, showing the steam-cylinder A, piston B, cylindrical slide-valve U, pump O, ram' M, pump support 'orbase N, pipe-connection and rod-guide U, and lift-pump T, throttle or regulating lvalves b b', vmain steam-passages Fig. 2 is a vertical section through the line:

9 and 10, Fig. 3, showing the steam-supply ports a a', exhaust from Cylinder f', exhaustport in piston B atf, steam-ports for supply and exhaust in theY piston at.g g, steam-port" for' the lower -endof'steam-cylinderV inthe" valve C at x, steam-port' for vthe'u'pperend of' steam-cylinder'in the valve O aty, and the exhaust-port in valve C at z.

Fig. 3 is a cross-section' through the'line 1A and 2, Fig. 2, showingthe high-steam chaunels D D in cylinderA'and piston B,'exha'ust`. f

port f from steam-cylinder, exhaust-"porti:l from Valve-Chamber through the piston; port g', leading steam to' andl from" the upper end of steam-cylinder; guidescrew l, reachinginto al A slot formed in piston B; small steamopening I, through the steamvalveO, at eachend';

' high-steam channel m, leadingto'lower'end of steam-valve C; and exhaust-'chamber Z'in valve C.

Fig. 4 is a 'cross-section' through the line 5 and 6, Fig. l, showing plan oi' stuffing 'box"k, pipe-connection V, and base N.

Fig. 5 is a cross-sectionthrou'gh"the line 3 i and 4, Fig. l, showing plan of stufng-box gland k, base of pump O, opening'through plunger M, also plan of valve-caps.

Fig. 6 is a perspective View of steam-piston B, pump-ram M, steam-port D, exhaust-port f, supply-port'g, andfsm'all e'xhaustp'orts hh". The second figurevv is a viewv of thecylindrical Islideval'v'e U, wherein is s'h'owfn'the highsteam 'passage m w', leading to 'the lower end of steamoylinder; port 'YV ofvhgh-steam passage, leading toward lthe upper' end'of steamcylinder; 'exhaustport Z, and the small steamT opening'l at one'end ofthevalve.' A similar vopening at the other end of the'valve is not shown in this figure. The third ligureV L represents thev Cap or' cover'to' open'end of the piston B'. y I

The steam-cylinder has a length equal to twice'the stroke and lapof thepiston, which has also addedlength in" proportion, and incl'oses' the valve in the manner described in Letters Patent of the United Statesmumbered 56,242, granted to us J uly`l0,`1866, forste'amengine g `but inthe herein-described machine we make a permanent partition in the'valve G, separating vthe' steam-passagesw land y, in which the How ofsteam to the respective ends of the vsteam-cylin'der'is controlled by'the adjustment ofthe valves b b', to admit proper quantities or'pressures of steam required to suit-,the character of the work' being done. We vvform the channels and ports D D in the piston to serve as' continuations ot" the 'main passages a a', and to conduct the steam into the valve C; thence through the'separate'passages formed in 'the valve lon its way to each end of the steainoylinder'.` The ezhaustport f', made in the shell of the steam-cylinder, is

common to both ends, and is"'free :to all es eapements arising from the play of the valve bythe provision' ot' two ports, h h, through the wall of the piston, as they are' alternately brought in communication withacavity or branchextending from and' being partv of 'the port'f.

The pistouB and ramv M are castI in one single piece, with cavities'to avoid excessive weight, then nished to cover vthe' ram with brass whend'esired. This ram"is'designed for the singleacting patternof pump, orrod and a'fpi'ston, withy side passages'iormed on pump O, may be substituted, tomakeitd'iible-acting. The piston end of this casting is finished to serve as a chamber for valve C, a slot in the chamber and a leather inserted in the valve guide the latter in its movement. The lower end of the piston is lsteam into the cylinder.

closed by the continuous casting. The upper end is closed by securely bolting thereon the cap L after the valve has been titted in its chamber. The ports g g in the cap and bottom of' piston are made to deliver the The hole W in the ram, at a point between the stuft'ers k 7a is formed to receive a bar, introduced through the distance-piece at w and w, in order to move all working parts upward for thorough draining, and as may be desired.

The cylinder A, distance-piece, and pump O are cast together in one piece, with the wrought nuts for stung-box bolts accurately inserted in place, and with ports, passages, recesses, and cavities formed therein ready for dressing and fitting. One cavity on thc discharge side of pump 0.` is made to serve for air-chamber; another on the suction side is made to serve for vacuum-chamber.

The pump-valves are of ordinary construction. The stufiing-box glands are made separately, and secured in place by screwing bolts into the inserted nuts. The cylinderhead is made separately, fitted and bolted to place,=with the valves b b completed Atherein ready for use. The frame-support or base N is made separate, and litted to support the pump, and to permit the extension of a pump-rod screwed to the bottom ot' the ram to pass downward to the lift-pump T through two stuffing-boxes, K and K, widely enough separated to afford space between them to couple or connect the proper length of rod. The bottom of the support forms a channelplate, on the under side of which a pipe attachment is made in communication with the channel V, from whence a pipe reaches to, and connects with, the pump T. This pipe has the pump-rod to work within it, and when of such a length as to require it one or more of our combined pipe-couplings and rod-guides are employed. This combined pipe-coupling and rod-guide is cast of an enlarged globular form, with a webbed diaphragm, having Water-ways around it, and bored out to t and guide the rod, as shown by the letter U and U, Fig. l.

The pump-rod is connected to the working parts of the lift-pump, which is ot' ordinary construction. v

To operate this machine, steam is admitted through a', Fig. l, and passes through the regulating-valves b b', Which are adjusted l to allow the quantity of steam to pass required to give the piston B a regular reciprocating motion suited to the required duty, the steam passes through the main passages a, a, in the direction of the arrows into the piston B and valve C, through the ports .fr and y and g g, into the cylinder.

The piston is shown as having just completed its downward stroke, and the valve C is in the middle of its motion upward, to give lsteam through the ports :r and g to the lower end of the cylinder, while the steam in the uppery end of the cylinder is finding its exit at f. The steam passes out of the valve C at each end, by the small holes I I, into the chamber G', and the pressure balances until the motion of the piston up or down brings the exhaust-ports f in communication with f, which then lets the steam out4 of the valve-chamber faster than it can be supplied through the holes I, thus unbalancing the pressure on the ends of the vulve, causing it to move in the opposite direction from the main piston, thus reversing the motion alternately'as long as the steam is supplied. The reciprocating motion ot' the piston is communicated to the ram and to the working parts of' the lift-pump below. The Water is lifted and ows up through the pipe andpassage V from well o r reservoir by the upstroke, and is delivered into tank or heater, from which it is conducted to the pump O, the downstrokeof which then forces the water into the boiler or other vessel.

Having thus fully described the construction and operation ot' our invention, what we claim, and desire to secure by Letters Patent, is

1. The separate throttle or regulating valves b b, arranged to control the how and quantity of steam admitted through separate passages to each end of the steam-cylinder, substantially as described.

2. The cylindrical slide-valve C, with passages X Y, to convey the steam to opposite ends ofthe steam-cylinder, substantially as described.

3. The valve' O with the openings I I, constructed and arranged with reference to the chamber C and the induction and eduction ports thereof', substantially as described.

4. The arrangement of the piston-head and pump-ram and the main steam-valve, moved direct by pressure of steam admitted through separate passages into each end ofthe steamcylinder, and controlled by separate throttle or regulating valves, substantially as specilied.

5. The arrangement of the pumping-engine A B, the pump and ram 0 M, the base N, and pump F, with reference to each other, substantially as described.

JAMES R. MAXWELL. EZRA COPE. Attest:

CHARLES BAUER, STEPHEN REED. 

